Dust-collector



(No Model.) r 4 Sheets-Sheet1) W. A. OOOKRELL.

DUST OOLLBGTO'R. No. 410,152. Patented Sep11.3, 1889 I u. PETERS. mmumgr. wan- 1mm;

(No'ModeL) 4 Sheets- -Sheet 2.

W. A. OOUKRELL.

DUST COLLECTOR No. 410,152. Patentgd Sept 3. s, 1889.

4 Sheets-Sheet 3.

(No Model.)

W. A. OOOKRELL. DUST GOLLEGTOR.

Patented Sept. 3, 1889.

525% I Z/m N. PETERS, PhokoLilhngrapher. Wuhingmn. n c.

UNITED STATES PATENT OFFICE.

WILLIAM A. COGKRELL, OF DAYTON, OHIO.

DUST-COLLECTO R.

SPECIFICATION forming part of Letters Patent No. 410,152, datedSeptember 3, 1889. Application filed July 2, 1888- Serial No. 278,872.(No model.)

- from the air; and this end I claim to accom- .plish by a machine whichimparts to the air while moving in a vortex within theseparation-chamber an additional impulse which serves to maintain oreven increase thevelocity, thereby imparting a stronger centrifugalforce than is attainable where the movement of the current is diminishedby-friction and obstruction.

This invention consists in novel combinations of mechanism foraccomplishing the foregoing separation and imparting to the air-currentin the separation-chamber an accelerated movement.

In the annexed drawings, making a part of this specification, Figure 1is a longitudinal vertical section upon the line a a; of Fig. 3. Fig. 2is an end view of the revolving cylinder. Fig. 3 is an end elevation,partly in section. Fig. 4 is a transverse vertical section. Fig. 51s alongitudinal verticalsection with parts broken away; Fig. 6, a Viewillustrating the wedge-shaped partition hereinafter re ferred to. A

The same letters are employed in all the figures in the indication ofidentical parts.

A is the casing forming the separationchamber X. It is substantiallycircular in cross-section, and is formed with heads A,

having circular openings AF for the escape of the air.

B is an air-induction pipe arranged tangentially to the casingA, andintended to deliver the dust-laden air into the interior chamber X,around which it sweeps in a vortical motion.

D is a rotating cylinder carried upon a shaft E, which is revolved by apulley E, connected by a belt with any convenient driving-pulley, andhas its. bearings on brackets E bolted to the heads of the case. Thecylinder D is formed with two annular heads D, connected by stay-rods Dand also bya series of blades D which are arranged in one or more rowsto make them of the form shown in cross-section in Fig. -lt-hat is tosay, with their forward faces radial to the axis of the drum and theirrear faces inclined or tangential to a circle of smaller diameter thanthe drum-the purpose being to produce a surface through which the airmay pass into the interior of the cylinder, while avoiding theproduction of a strong outward blast of air, which would tend topreclude the air from entering the cylinder. The purpose of the cylinderis to prevent the retardation of the infiowing current of air by reasonof frequent impulses upon the surface of the central cylinder, as wouldbe the case were the cylinder stationary instead of being arranged torotate. This cylinder is intended to be driven at a peripheral velocitygreater than that of the entering current of dust laden air, and theblades D act upon the air-current to main-v tain or even increase thevelocity of the air driven into the chamber. This cylinder is driven inthe same direction as the vortical current, and the blades D impel itforward to prevent that loss of velocity which is incident to the actionof other machines of this class. a i

Between the casirg'and the cylinder D a wedge-shaped partition (J isplaced, which is intended to separate the air-current and give tothedivided currents respectively a direction toward the ends of themachine. This wedge-shaped partition is indicated by dotted lines inFigs. 1 and 3 and is shown in Figs. 5 and 6.

To prevent the dust-laden air from flowing through the space between theheads D of the cylinder and the ends A of the case and escaping throughthe opening A I place upon the heads D ribs D inclined back from theradial line in the manner common in fanblades, as shown, and nearlyfilling the'space between D and A, which, as they rotate rap idly withthe cylinder, drive back the air into the space between the periphery ofthe cylinder and the casing, and thus prevent its escape in thatdirection. The shaft E is 0011- nected to the annular heads D of thecylina o q der by spiders F, with flanges upon their periphery, betweenwhich and the heads D, I secure the outer ends of the tubular air-escapeG, which is of the same diameter as and is placed in line with the holesA H H are overlapping gather-boards placed in the line of the curve ofthe separationchamber and in the ascending segment, between which thedust thrown outwardly by centrifugal force and carried forward by theaction of the vortical current is intended to escape, falling into adead-air chamber I, formed by an extension of the case, as clearly shownin the drawings; thence it falls into the conveyer K and is carried awayto a delivery-spout.

The conveyer may be revolved by a link belt L, extending from asprocket-pulley on shaft E to one on the conveyer-shaft, (shown at K Agreater portion of the dust, by reason of the direction given to thedust-laden current by the wedge-shaped partition 0, impinges against theheads of the casing A, and to permit its ready escape I form holes Athrough the heads A, through which the dust may pass into the deadairchamber and thence to the conveyer. These holes are chamfered on theiredges, so as to cause them to pass diagonally through the casing, inorder to re ceive the flying dustmore directlyin theline of itsmovement. They are so disposed as to entirely occupy some part of theentire space between the cylinder and the periphery of casing, in orderto insure the escape of the dust swept along or toward any part of thatsurface.

The operation of the machine is as follows: A current of dust-laden airis driven by the fans of the purifiers or other machines through thepipe B into the separating-chamber,where the solid particles are driventoward the ends and periphery of the casing and swept forward until, onthe ascending segment, they escape through the openings provided for thepurpose and fall through the dead-air chamber into the conveyer-trough.The rapidlyrevolving cylinder, by means of its blades D maintains thecurrent at its highest velocity, thus maintaining the intensity of thecentrifugal action, and also causing an excess of pressure above thenormal in the separation-. chamber.

Such an excess of pressure would usually react on the air-induction andinterfere with the action of the purifier-fan; but by imparting to theair in the separationchamber an accelerated movement, although there isan increase of pressure, it is so drawn away from the mouth of theair-induction pipe as that it is not felt on the purifier or other fan.This action I believe to be entirely novel. The force of the action ofthe blades D is, however, not sufficient to prevent the air escapingfrom the interior of the vortical current through the space between theblades in obedience to the pressure maintained in the separation-chamberand escaping from the interior of the cylinder through the tubulardischarges G and openings A \Nhile I have used with satisfactory resultsa cylinder having blades D formed substantially as shown in thedrawings, I do not wish to be limited to the precise form shown, forsuch blades may be varied in form without substantially departing frommy invention. I have shown such blades as arranged in two rows; but oneI have found sufficient to produce good results, or more may, ifpreferred, be employed.

The form of the machine may also be modified without alteringsubstantially its principle of operation. Thus the air may be introducedat either end, or below or above, or the machine may be made to standupright. Wherever the induction-pipe is located it must, however, havesuch direction as that the dust-laden air delivered into the interior ofthe case shall receivea vortical movement, sweeping around the innersurface of the casing, whereby the particles of solid matter carriedupon the current shall, by the action of centrifugal force, have atendency to move outward, and being restrained by the casing to be sweptaround its surface. The air thus entering with an already establishedvelocity receives from the blades D an additional impulse, tending toaccelerate the movement of the current, in which respect my ma chine isradically different from that class of machines in which the vorticalmotion is derived from rotating blades operating in conjunction with anauxiliary suction-fan, while my machine belongs to that class in whichthe vortical movement is due to the form of the casing and thetangential direction of the induction-pipe, so that the cylinder actsupon an already established current and in the line of its movement, itsfunction being merely to maintain or accelerate the velocity of thevortical current.

For the cylinder D may be substituted any rotating fan. formed torevolve within the chamber, and having blades so formed as to give theforward impulse to the vortical current, and yet at the same time withspaces between, left open for the escape of the air after it has givenup the dust which entered the casing with it.

I have called D a cylinder for brevity merely. I do not intend to claimthe exclusive right to any sort of a cylinder in a dust-collector, forcloth cylinders have been suggested by others. I employ the word in thisspecification as designating a revolving body formed with blades whichare capable of giving a forward impulse to the vortical current, andhaving open spaces for the outflow of the air from theseparation-chamber through the interior of the cylinder into theatmosphere.

WVha-t I claim as my invention, and desire to secure by Letters Patent,is

1. In a dust collector, the combination, with the tangentialair-induction pipe B and casing A, of a revolving cylinder D, havingblades D and independently driven in the direction of the movement ofthe vortical current, substantially as set forth.

2. In combination with the tangential airinduction pipeB,casingA,provided with openings A and revolving cylinder D, awedgeforined partition 0, interposed between the cylinder and easing,substantially as set forth.

3. In combination with the air-induction pipe B, casing A, and revolvingcylinder D, inclined ribs D placed between the heads A and D andattached to the latter, substantially as set forth.

4. In combination with the tangential airinduction pipe B, casing A; andrevolving cylinder D, the tubular air-escape G, attached to the cylinderand in line with the opening A substantially as set forth.

5. In combination with the tangential airinduction pipe B, casing A, andseparationchamber X, the dead-air chamber I and overlappinggather-boards H, placed between said chambers, substantially as setforth.

6. In combination with the air-induction pipe B, casing A, revolvingcylinder D, and partitions 0, holes A", formed in the end of the casing,and a dead-air chamber I, substantially as set forth.

7. In combination Withthe air-induction pipe and the separation-chamberof a dustcollector, the holes A formed in the end A of the casing, forthe escape of the dust, sub stantially as set forth.

8. In combination with the air-induction pipe and separation-chamber ofa dust-collector, the holes A formed in the end A of the case and cuttransversely through the same, substantially as set forth.

9. In combination With the air-induction pipe and separation-chamber ofa dustrcollector, the revolving cylinder D and openings through the casefor the escape of the dustperipherally and at the end, substantially asset forth.

In witness whereof I have hereunto subscribed my name in the presence ofthree attesting witnesses.

WILLIAM A. COCKRELL.

In presence of- JOHN M. SPRIGG, EDWARD L. RUNE, WEBSTER -W. SHURY.

